Pull-up chin bar



FIG. 1 is a perspective view of a pull-up chin bar showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a side elevational view thereof; and

FIG. 6 is a rear elevational view thereof. 

The ornamental design for a pull-up chin bar, as shown and described. 